Astronomy Picture of the Day——斯洛伐克上空的英仙座流星
Perseid Meteors over Slovakia
Image Credit & Copyright: Petr Horálek
Explanation: Tonight is a good night to see meteors. Comet dust will rain down on planet Earth, streaking through dark skies during the peak of the annual Perseid Meteor Shower. The featured composite image was taken during last year's Perseids from the Poloniny Dark Sky Park in Slovakia. The unusual building in the foreground is a planetarium on the grounds of Kolonica Observatory. Although the comet dust particles travel parallel to each other, the resulting shower meteors clearly seem to radiate from a single point on the sky in the eponymous constellation Perseus. The radiant effect is due to perspective, as the parallel tracks appear to converge at a distance, like train tracks. The Perseid Meteor Shower is expected to peak after midnight tonight, although unfortunately this year the sky will be brightened by a near full Moon.
斯洛伐克上空的英仙座流星
今晚是观赏流星的绝佳夜晚。彗星尘埃将会像下雨一样降落在地球上，每年一度的英仙座流星雨将划过黑暗的天空。这幅特征图像是在去年英仙座流星雨期间在斯洛伐克的波洛内尼暗夜公园拍摄的。前景中与众不同的建筑是科罗妮卡天文台的一座天象厅。尽管彗星尘埃颗粒彼此平行运动，但由此形成的流星雨看起来似乎是从天空中的一个点辐射出来的。辐射效应归因于角度问题，因为平行的流星余迹似乎会在远处汇聚于一点，就像火车轨道一样。英仙座流星雨预计将在今晚午夜后达到峰值，但是不幸的是，今天的夜空将被一轮满月照亮。
原图地址：
https://apod.nasa.gov/apod/image/1908/PerseidsSlovakia_Horalek_1089.jpg
近期文章：
Astronomy Picture of the Day——哈勃展示的木星新肖像